Practical applied electricity; a book in plain English, for the practical man. Theory, practical applications and examples (1911)
Moreton, David Penn, 1882- · Chicago, The Reilly & Britton co · leaf 103
Fig. 65 Fig. 66 105. The Toroid.~If a solenoid is bent around until itstwo ends meet, or if a winding is placed on a ring, thearrangement thus produced will be a toroid. By windingthe various turns closely and uniformly over the entireperiphery of the ring, the lines of force produced insidethe…
Electrical engineering
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